function photo(img,num){
	document.write('<img src="http://www.sonymusic.co.jp/common2/img_c/spacer.gif" width="368" height="275" border="0" alt="" id="');
	document.write(num);
	document.write('" class="photo"><br>');
	document.getElementById(num).style.backgroundImage = 'url(img/' + img + '.jpg)';
}

function photo_link(num){
	var prev = num - 1;
	var next = num + 1;
	document.write('<a href="'+ prev +'.html"><img src="../img/btn_01.jpg" width="85" height="29" border="0" alt="BACK" /></a><a href="'+ next +'.html"><img src="../img/btn_02.jpg" width="85" height="29" border="0" alt="NEXT" hspace="10" /></a>');
}